Author: imp
Date: Mon Aug 28 19:25:49 2017
New Revision: 322976
URL: https://svnweb.freebsd.org/changeset/base/322976
Log:
Add comment about where we need to place this routine, and why.
Sponsored by: Netflix
Modified:
head/sys/cam/scsi/scsi_da.c
Modified: head/sys/cam/scsi/scsi_da.c
==============================================================================
--- head/sys/cam/scsi/scsi_da.c Mon Aug 28 19:17:28 2017 (r322975)
+++ head/sys/cam/scsi/scsi_da.c Mon Aug 28 19:25:49 2017 (r322976)
@@ -4200,6 +4200,12 @@ dadone(struct cam_periph *periph, union ccb *done_ccb)
if (LIST_EMPTY(&softc->pending_ccbs))
softc->flags |= DA_FLAG_WAS_OTAG;
+ /*
+ * We need to call cam_iosched before we call biodone so that we
+ * don't measure any activity that happens in the completion
+ * routine, which in the case of sendfile can be quite
+ * extensive.
+ */
cam_iosched_bio_complete(softc->cam_iosched, bp, done_ccb);
xpt_release_ccb(done_ccb);
if (state == DA_CCB_DELETE) {
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